Bushing puller



B. E. DELLE BUSHING FULLER Oct. 30, 1928. 1,689,330

Filed July 5, 1927 9 Sheets-Sheet l Oct. 30, 1928.

- 1,689,330 B. E. DELLE BUSHING FULLER Filed Jilly 5, 1927 9 sheets-Sheet :5

Oct. 30, 1928. 1,689,330

B. E. DELLE BUSHING FULLER Filed July 5, 1927 9 Sheet s-Sheet 6 NW Mm Oct. 30, 1928.

B. E. DELLE BUSHING FULLER 9 Sheets-Sheet '7 7. 2 9 1L 5 4 1 d e m \LQ \w W E NM. v1 Y 4% 9 a B. E. DELLE BUSHING PUL LER Oct. 30, 1928.

Filed July 5,

Oct. 30, 1928. 1,689,330

B. E. DELLE BUSHING FULLER Filed July 5, 1927 9 Sheets-Shet 9 mmii' a Patented Oct. 30, 1928.

UNITED STATES BERNHARD E. BELLE, F BROOKLYN, NEW YORK.

BUSHING FULLER.

Application filed July 5, 1927.

Thisinvention relates to an improvement in bushing-pullers and particularly to bushing-pullers for inserting and removing the bushings of locomotive cylinders and the like. The object of this invention is to provide a simple, convenient, easily assembled and disassembled device of the class described.

lVith this general object in view my invention consists in a bushing-puller characterized by its provision with a threaded pull-rod extending between a cylinder-engaging fixture and a bushing-engaging fixture, a nut co-acting with the pull-rod, and a reduction-gearing for causing relative rotation between the pulhrod and nut.

The various parts of my improved bushing-puller may be combined in many different arrangements, as will appear from the accompanying drawings, in order to adapt it to varying situations where, end-room, clearances, etc, may be considered, as is particularly the case when operating .upon the cylinder bushings of locomotives, which are widely different in type. For this reason I shall first describe the major parts without regard to any particular arrangement of them. Subsequently several different arrangements of parts will be described in detail.

In the accompanying drawings:

Fig. 1 is a view in 1eft-hand end elevation of one form which my improved bushingpuller may assume;

Fig. 2 is a broken view thereof in side elevation;

Fig. 3 is a view thereof in right-hand end elevation;

Fig. 4 is a transverse sectional view on the line H of Fig. 2 on an enlarged scale;

Fig. 5 is a corresponding view 'on the line 5-5 of Fig. 2;

Fig. 6 is a similar view on the line 66 of Fig. 2;

Fig. 7 is a view in vertical central longitudinal section on the line 77 of Fig. 1 on the same scale as Figs. 4, 5 and 6;

Fig. 8 is a broken detail sectional view showing the pull-rod, pull-rod nut, and the two-part abutment-collar assembled together; I

Fig. 9 is a detached end view of the pullrod nut;

Fig. 10 is a view thereof, partly 1n side elevation and partly in section;

Fig. 11 is a detached perspective View of the two-part abutment-collar;

Serial No. 203,293.

Fig. 1 2 is a similar view of the assemblyring the two-part abutment-collar;

Fig. 13 is a view corresponding to Fig. 7 but showing an alternative arrangement of the parts, in which the reduction-gearing, hydraulic cylinder and piston are all mounted on the bushing-fixture, whereby the pull-rod revolves and travels with the bush ing and the pull-rod nut remains stationary;

F 1g, 14 is another view corresponding to Fig. 7 and showing another arrangement of the parts in which the hydraulic piston and cylinder and the reduction-gearing are all mounted on the cylinder-fixture, whereby the pull-rod revolves without endwise movement and the pull-rod nut travels with the bushing but does not revolve;

, Fig. 15 is another view .correspondingto Fig. 7 and showino' another arrangement of the parts in which the hydraulic cylinder and piston are mounted on the cylinder-fixture and the reduction-gearing on the bushinglixture, whereby the pull-rod remains stationary and the pull-rod nut both rotates and travels with the bushing;

Fig. 16 is a View corresponding to F ig. 7 with the exception that the hydraulic cylinder, piston and closely-associated parts are omitted; the reduction-gearing being mounted on the bushing-fixture, whereby the pull-rod nut is held stationary and the pull-rod both revolves and travels endwise with the bushing;

Fig. 17 is a view corresponding to Fig. 16 and showing another arrangement of the parts, in which the reduction-gearing is mounted on the cylinder-fixture so that the pull-rod nut revolves and the pull-rod travels endwise with the .bushing but does not rotate; i

Fig. l8 is another View corresponding to Fig. 16 and showing another arrangement of the parts in which the pull-rod rotates but has no endwise movement and the pullrod nut is held against rotation but travels with the bushing;

Fig. 19 is another view corresponding to Fig. 16 and showing another arrangement of the parts in which the reduction-gearing is mounted on the bushing-fixture and the pullrod is rigidly mounted in the cylindenfixture, whereby the pull-rod nut both revolves and moves bodily-with the bushing.

In carryin out my invention as shown I employ apul -rod threaded at one end for approximately half its length and provided at its opposite end with a rounded drat'tshoulder 21 and a hexagonal head 22. N ear its outer end the hexagonal head just mentioned is formed with an annular groove 23 for the purpose as will hereinafter appear.

For the purpose of transmitting the draft of the pull-rod to a bushing 24: which is to be inserted into a cylinder 25 I employ a bushing-fixture consisting 01 a skeletonized plate 26 provided upon its perphery with a series of stepped shoulders 27. These shoulders adapt the plate 26 to engage the ends of bushings 0t dillerent diameters and also permit it to receive an adapter-ring 23 when it is desired to pull bushings having a diameter larger than the largest of the shoulders 27. The central hub 29 of the plate 26 is formed with a polygonal bore 30 adapted to receive a polygonal bushing 31 whose exterior is shaped to correspond to the said bore and whose interior is shaped to correspond to the hexagonal head 22 of the pull-rod 20. Axially in line with the passage 30 the hub 29 is also formed with a connecting counterbore 32 which latter may receive either the reduced. inner end of a hydraulic cylinder 33 as shown in Fig. 7 or the corresponding inner end of a reductiongear housing 3 1 as shown in Fig, 13.

The hydraulic cylinder above mentioned is provided with a hydraulic pressure-gauge and receives a hollow piston 36 having three radial arms 37. These arms 37 are perforated for the reception of tie-rods 38 which extend inward to the corresponding arms of a coupling-head 39 which is recessed as at 4.0 so as to engage either the draft shoulder 21 of the pull-rod as shown in Fig. 7. or the correspondingly shaped inner end 11 of an anti-friction thrust-bearing 12 as shown in Fig. 13.

Midway of its length the pull-rod has mounted upon it a bushing-simporting spider 13 having three arms 14 each of which is provided with two guide-lugs through which a rod-like adjustingfinger 16 passes. The said lingers are each threaded for the reception of an adjusting-nut 17 which is located between the guide-lugs 45 aforesaid.

The reduetion-gear housing 34 previously mentioned is provided with a cover-plate 4:8 and with two axially-arranged anti-friction bearings lt) which latter support a wormwheel formed with a long hub 51 having a polygonal bore 52 adapted to receive either a hexagonal pull-rod nut 53 (Fig. 7) or the hexagonal head 22 aforementioned of the pull-rod 20 (Fig. 13), whereby either the said nut or pull-rod may be coupled with the worm-wheel 50 for rotation with it.

The pull-rod nut 53 just above mentioned is formed with an annular coupling-groove 54 for the reception of a two-part abutment collar 55 (Fig. 11) which engages the hub 51 of the worm-wheel 50 and which is clamped in place by means of an assemblingring 56 (Fig. 12). The pull-rod nut 53 is internally threaded throughout its length with the exception of that part lying be tween its outer end and the outer end of its coupling-groove 5 1 as clearly shown in Fig. 10. The emission of the threads at the outer end. of the nut as just described serves to create a safety point, asit were by providing a relatively-thin tubular wall indicated at A in Fig. 10 which is carefully designed to withstand all normal work stresses but which will break when an abnormal strain is applied to it and thus prevent damage to the remainder of the mechanism.

Directly below and meshing with the worm-wheel 50 is a worm 57 also mounted in the reduction-gear housing 34 upon a stub-shaft 53 formed with square ends 59 adapting it to be conveniently connected to a source of power by means of a flexible shaft or other suitable coupling.

To prevent its rotation the reduction-gear iousing is formed with two cars 60 which are adapted, as occasion may require, to straddle a lug (31 formed upon one of the ribs 62 of a cylinder fixture 63 as shown in Fig. 7 or to similarly engage a lug 6 1 formed on one of the ribs of the skeletonized plate 26 as shown in Fig. 13. The cylinder-fixture (53 just mentioned is provided with a hub (35 having a polygonal axial bore (36 adapted in size and form to receive the polygonal. bushing 31 (Fig. 13) and with an aligned counter-bore 67 which latter is adapted to receive either the reduced inner end of the reduction-gear housing 34: as shown in Fig. 7 or the corresponding inner end of the hydraulic cylinder 33 as shown in Fig. 15.

Between the cylinder-fixture 63 and the end of the cylinder 1 interpose a spacingring 68 which is perforated to clear the studs 69 of the cylinder and to permit the passage through it of cylindrical nuts 70 internally threaded to [it the studs 69 and provided at their outer ends with hexagonal heads 71.

In Figs. 1 to, 7 inclusive of the drawings, 1 have shown the parts of my improved bushing-puller assembled in such manner that the reduction-gear is mounted upon the cylindenfixture and remains bodily station ary. The hexagonal pull-rod nut 53 is entered into the correspondingly shaped bore of the worm-wheel 50. so that it turns therewith and acts to pull the pull-rod to the left so as to exert a corresponding draft upon the bushing-fixture and bushing through the intermediary of the hydraulic piston and cylinder. In this arrangement of parts, the pull-rod is held against rotation by the entry of its hexagonal head 22 into the correspondingly shaped bore of the bushing 31. In this arrangement also the force being exerted in pullng the bushing 24: into the cylinder 25 is indicated by the hydraulic gauge 35.

loo

In Fig. 13 of the drawings I have shown the pull-rod nut 58 mounted and held against rotation in the cylinder-fixture by means of the polygonal bushing 31. In this arrange ment also, the reduction-gearing is mounted in the bushing-fixture, the hydraulic cylinder being in turn mounted in the cover-plate 48 of the gear-housing 34, with the result that when power is applied to the worm 57, the pull-rod will rotate within the pull-rod nut 53 and bodily travel endwise with the bushing fixture.

In Fig. 14 I have shown the reductiongearing, hydraulic piston and hydraulic cylinder all mounted on the cylinder-fixture, the pull-rod being reversed end for end so that it is coupled for rotation with the wormwheel by the entry of its hexagonal head 22 into the correspondingly shaped bore 52 of the worm-wheel hub 51. In this arrangement of parts also the pull-rod nut is mounted in the bushing-fixture and is held against rotation by the polygonal bushing 31 with the result that the pull-rod is rotated but has no endwise movement, while the pull-rod nut has no rotary movement but moves bodily endwise with the bushing-fixture.

In Fig. 15 of the drawings I have shown the hydraulic cylinder and piston mounted upon the cylinder-fixture and the reductiongearing mounted upon the bushing-fixture. Under this arrangement of parts the pullrod has neither rotation nor endwise movement, while the pull-rod nut both rotates and travels endwise with the bushing-fixture.

In Fig. 16 I have shown an arrangement of parts in which the hydraulic cylinder and piston are omitted as they also are in the following figures and in which the pull-rod revolves in the stationary pull-rod nut and travels endwise with the bushing-fixture.

In Fig. 17 I have shown the reductiongearing mounted on the cylinder-fixture so as to rotate the pull-rod nut 53 with respect to the pull-rod, which latter is held against rotation in the bushing-fixture by the polygonal bushing 31 and travels endwise with the bushing.

Fig. 18 shows an arrangement of parts in which the draft of the pull-rod is transmitted to the cylinder-fixture by means of the hub 51 of the worm-wheel and the housing 34. In this arrangement of parts the pull-rod rotates but has no endwise movement, while the pull-rod nut both rotates and moves bodily with the bushing-fixture.

Fig. 19 shows the reduction-gearing mounted upon the bushing-fixture so as to rotate the pull-rod nut with respect to the pull-rod which is held against rotation in the cylinder-fixture by the polygonal bushing 31 and has no endwise movement.

From the foregoing it will be seen that the parts of my improved bushing-puller are capable of being combined in a variety of ways, to adapt the bushing-puller to meet the demands of a Variety of conditions. It will also be seen that in all ofthe arrange ments of parts shown in the drawings by applying power to the shaft 58 of the worm 57, the worm-wheel 50 will be rotated with the effect of similarly rotating either the pull-rod nut with respect to the pull-rod 20 or of rotating the pull-rod with respect to the said nut, whereby the bushing 24 will be moved into the cylinder 25. In the arrangement of parts in which the draft of thepullrod 20 is transmitted through the hydraulic cylinder 33 and piston 36, the gauge 35 will indicate the effort being exerted so that the operator may be informed if the strains are nearing or exceeding the limit of safety. In the event that the operator ignores the warnings of the gauge 35 or if the hydraulic piston, cylinder and gauge are omitted from the assembly for any reason, it is intended that the tubular section A (Fig. 10) shall act as a safety and break when the draft upon the pull-rod reaches an unsafe point.

By employing the two-part abutmentcollar, I am enabled to assemble and disassemble niy improved bushing-puller with great ease and facility.

I claim:

1. In a bushing-puller, the combination with a cylinder-engaging fixture and bushing-engaging fixture, of an externallythreaded pull-rod, an internallythreaded member carried by one of the said fixtures and engaging the threads of the said pullrod, and reduction-gearing for causing relative rotation between the said pull-rod and member, whereby the pull-rod may be placed under tension and the said bushing-engaging fixture pulled toward the cylindenengaging fixture. I

2. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture, of an externally-threaded pull-rod, a pullrod nut engaging the threads of the said pullrod, reduction-gearing for causing relative rotation between the said pull-rod and pullrod nut, whereby the pull-rod is placed under tension, and a hydraulic cylinder and piston mounted in one of the said fixtures for trans mitting the draft of the pull-rod to one or the other of said fixtures.

3. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture, of an externally-threaded pull-rod, a pullrod nut engaging the threads of the said pull-rod, a reduction-gearunit for causing relative rotation between the said pull-rod and pull-rod nut, and means for coupling the said reduction-gear unit to one of the said fixtures to prevent the rotation of the said reduction-gear unit.

4. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture,

lt li there being a polygonal bore formed in one 01'' the said fixtures, of an externally-threaded pull-rod having a polygonal head, a pullrod nut engaging the threads of the said pull-rod, reduction-gearing having a rotary member provided with a polygonal bore for causing relative rotation between the said pull-rod and said pull-rod nut, whereby the pull-rod placed under tension.

5. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture, of an externally-threaded pull-rod, a pullrod nut engaging the threads of the said pull-rod, and a worm and worm-whee for causing relative rotation between the said pull-rod and pull-rod nut, whereby the pullrod is placed under tension.

6. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture, of an eXternally-threaded pull-rod, a pullrod nut engaging the threads of the said pull-rod, there being an annular groove formed in the said nut, a divided abutmentcollar adaptcd'to engage the said groove, an assembling-ring for the said abutmentcollar, and reduction-gearing for causing relative rotation between the said pull-rod and pull-rod nut, whereby the pull-rod is placed under tension.

7. In a bushing-puller, the combination With a cylinder-fixture and bushing-fixture, of an eXternally-threaded pull-rod, a pull rod nut engaging the threads of the said pull-rod, a Wormand worm-wheel for causing relative rotation between the said pullrod and pull-rod nut, whereby the pull-rod is placed under tension, a housing for said worm and worm-wheel for transmitting the draft of the pullrod to one or the other of the said fixtures.

8. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture, of an externally-threaded pull-rod having a polygonal head, there being an annular groove formed in the said head for the reoeption of an abutment-collar, a pull-rod nut engaging the threads of the said pullrod, there being an annular groove formed in the said nut for the reception of an abutmentcollar, a reduction-gearing tor causing relative rotation between the said pull-rod and the said pull-rod nut, whereby the pullrod is placed under tension.

9. In a bushing-puller, the combination with a cylinder-fixture and bushing-fixture, of an externallythreaded pull-rod formed with a drattshoulder, a coupling-head engaging the said shoulder, a pull-rod nut engaging the threads of the said pull-rod, a reduction-gearing for causing relative rotation between the said pull-rod and pull-rod nut, whereby the pull-rod is placed under tension, a hydraulic member mounted in one ot the said fixtures for transmitting the draft of the pull-rod to one or the other of the said fixtures and consisting of a cylinder and piston, and tie-rods for connecting the said hydraulic member to the said couplinghead.

10. In a bushing-puller, the combination with a cylinder-fixture and bushing fixture, there being a polygonal bore formed in each the said fixtures, of a polygonal bushing adapted to fit either of the said bores, an externallythreaded pull-rod having a polygonal head adapted to fit the interior of the said bushing, a polygonal pullrod nut engaging the threads of the said pull-rod and also adapted to it the interior of the said bushing, reduction-gearing for causing relative rotation between the said pull-rod and pull-rod nut, whereby the pullrod is placed under tension.

In testimony whereof, I have signed this specification. 7

BERNI-IARD E. DELLE. 

